67 lines
1.8 KiB
YAML
67 lines
1.8 KiB
YAML
|
# SPDX-License-Identifier: GPL-2.0
|
||
|
|
%YAML 1.2
|
||
|
|
---
|
||
|
|
$id: http://devicetree.org/schemas/power/supply/lltc,ltc294x.yaml#
|
||
|
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
||
|
|
|
||
|
|
title: LTC2941, LTC2942, LTC2943 and LTC2944 battery fuel gauges
|
||
|
|
|
||
|
|
description: |
|
||
|
|
All chips measure battery capacity.
|
||
|
|
The LTC2942 is pin compatible with the LTC2941, it adds voltage and
|
||
|
|
temperature monitoring, and is runtime detected. LTC2943 and LTC2944
|
||
|
|
are software compatible, uses a slightly different conversion formula
|
||
|
|
for the charge counter and adds voltage, current and temperature monitoring.
|
||
|
|
|
||
|
|
maintainers:
|
||
|
|
- Sebastian Reichel <sre@kernel.org>
|
||
|
|
|
||
|
|
allOf:
|
||
|
|
- $ref: power-supply.yaml#
|
||
|
|
|
||
|
|
properties:
|
||
|
|
compatible:
|
||
|
|
enum:
|
||
|
|
- lltc,ltc2941
|
||
|
|
- lltc,ltc2942
|
||
|
|
- lltc,ltc2943
|
||
|
|
- lltc,ltc2944
|
||
|
|
|
||
|
|
reg:
|
||
|
|
maxItems: 1
|
||
|
|
|
||
|
|
lltc,resistor-sense:
|
||
|
|
$ref: /schemas/types.yaml#/definitions/int32
|
||
|
|
description: |
|
||
|
|
Sense resistor value in milli-ohms.
|
||
|
|
Can be negative value when the battery has been connected to the wrong end of the resistor.
|
||
|
|
|
||
|
|
lltc,prescaler-exponent:
|
||
|
|
$ref: /schemas/types.yaml#/definitions/uint32
|
||
|
|
description: |
|
||
|
|
The prescaler exponent as explained in the datasheet.
|
||
|
|
This determines the range and accuracy of the gauge.
|
||
|
|
The value is programmed into the chip only if it differs from the current setting.
|
||
|
|
The setting is lost when the battery is disconnected.
|
||
|
|
|
||
|
|
required:
|
||
|
|
- compatible
|
||
|
|
- reg
|
||
|
|
- lltc,resistor-sense
|
||
|
|
- lltc,prescaler-exponent
|
||
|
|
|
||
|
|
additionalProperties: false
|
||
|
|
|
||
|
|
examples:
|
||
|
|
- |
|
||
|
|
i2c0 {
|
||
|
|
#address-cells = <1>;
|
||
|
|
#size-cells = <0>;
|
||
|
|
battery@64 {
|
||
|
|
compatible = "lltc,ltc2943";
|
||
|
|
reg = <0x64>;
|
||
|
|
lltc,resistor-sense = <15>;
|
||
|
|
lltc,prescaler-exponent = <5>; /* 2^(2*5) = 1024 */
|
||
|
|
};
|
||
|
|
};
|